package se.janlindblom.ordning.helper;

/**
 * $Id: Puls.java 125 2010-01-04 19:16:13Z lindblom.jan $
 *
 * Copyright (c) 2009, Jan Lindblom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the project nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 */

import java.util.Observable;
import se.janlindblom.ordning.typ.Minute;

/**
 * Puls - a pulse generator. Generates {@link Minute}s every minute.
 * 
 * @author Jan Lindblom (lindblom.jan@gmail.com)
 * @version $Rev: 125 $
 *
 */
public class Puls extends Observable implements Runnable {
	private boolean running;
        private int counter;
	
	/**
	 * Creates a new Puls, not running.
	 */
	public Puls() {
		this.setRunning(false);
                this.counter = 0;
        }

        /**
         * Returns a {@link Thread} object with this Puls.
         *
         * @return a {@link Thread} with this Puls inside.
         */
	public Thread getThread() {
            Thread pulsThread = new Thread(this);
            pulsThread.setName("Puls");
            return pulsThread;
	}

	/**
	 * 
	 */
	@Override
	public void run() {
		this.setRunning(true);
		while (this.isRunning()) {
			try {
				Thread.sleep(1000);
                                this.counter++;
                                if (this.counter > 59) {
                                    this.counter = 0;
                                    this.setChanged();
                                    this.notifyObservers(new Minute());
                                }
			} catch (InterruptedException e) {
				this.setRunning(false);
			}
		}
	}

	/**
         * Returns the running state of this Puls.
	 * 
	 * @return true if the {@link Thread} of this Puls is running, false otherwise.
	 */
	public synchronized boolean isRunning() {
		return running;
	}

	/**
         * Sets the running state of this Puls.
	 * 
	 * @param running the running state of this pulse.
	 */
	public synchronized void setRunning(boolean running) {
		this.running = running;
	}
}
